Electrical heating device



June 14,1927,

R. M. MOFFITT ELECTRICAL HEATING DEVICE Filed Dec 10.- 1925 IN VEN TOR. M A TTORR EVE Patented June 14, 1927.

ROY M. M'OFFITT, OF MAUMEE, OHIO.

ELECTRICAL HEATING DEVICE.

Application filed December 10, 1925.

This invention relates t heating devices but more particularly to electrical heating devices for heating a room by convection currents.

Ubjects of this invention are to provide a simple and elficient heating system utilizing an electrical heating unit ant. embodying the principle of convection currents. and to provide a new and improved electrical heating unit having the unique features of construction and arrangement hereinafter more particularly described.

The invent-ion is shown by way of illustration in the accompanying drawings, in which,

F 1 is a longitudinal sectional elevation on the line 11 of Fig. 2 showing the heating unit; Fig. 2 is a section on the line 22 of Fig. 1 showing another portion of the heating uni and Fig. 3 is a transverse section on the line 33 of F 2.

The present invention is especially de signed for use in the heating of a single room and is designed to be secured in a pipe, not shown, which communicates with the room and embodies a heating unit 8 for secureinent in such pipe.

Connected to the inside of the unit are two pairs of ill-shaped brackets 10 and 11 which may be held in position by any suit able means, as by riveting. Connecting the pairs of brackets 10 and 11 a pair of heat radiating plates 12, the end portions 13 of which are bent outwardly and e:\:- tend in planes parallel to the planes of the plates 12. Connected to the upper outwardly bent portion 13 of the heat radiat ing ilates 12 are inwardly extending spring catches 141- which retain the heating unit in place, as will hereinafter be described.

'l heating unit comprises i frame havg parallel end rods 15 which are connected to longitudinally extending side bars 16 by screws 17. Mounted on the rods 15 are a plurality of insulating blocks 18 arranged in abutting relation, and each block is formed with a hole 19 in the inner side thereof substantially as shown. Also mounted on the rods 15 adjacent the side bars 15 are larger insulating blocks 20. A wire 21 which is wound from one end of the frame to tile other through the openings 19 in the insulating blocks 18 and the lower insulating blocks 2.0 serve as terminals for the ends of the wire. It will be noted that the lengths of wire 21 are arranged closely Serial No. 74,455.

together so that considerable number of lengths may be employed in a single unit.

in assen'ibling the heating device, the brackets 10 and 11. and heat radiating plates 1 2 arc arranged in their proper relative positions. Tlhcreafter the heating unitis inserted between the plates 12 until the upper pair of insulating blocks pass over the spring catches 1% which prevent the unit trom being ace lentally displaced and serve as a support for suspending the unit.

will be observed that the lengths of ure 21, upon becoming; heated, radiate heat to the plates 12, which in turn become heated and theair contacts with both the plates and the lengths of wire so that the in'ai-liinum ram tion area is provided.

FJhile l: have shown and described an embodiment of my invention as required by the statute, it is to be understood that the above is given merely by way of illustration and not 0: limitation, and numerous ncdi ications ar'l changes in details of construction and a- 'angenient may be cli'ected without depar ing from the spirit oi my invention, cspeoial y as defined in the appended claims.

'i hat l in: as new and dc ire to secure .1 tnt is:

a l heating device, a hous 7 opposed heat radiating housing having their ends ofl'- y of the major portions oi the plates, a heating: unit composed of a frame having end and side rods, a series of abuttin insuhiting blocks mounted on the end rods and ha vin perforations, large insulating blocks enga5,' g the ends of the rcspective series and abutting the side rods, :1 wire alternately threaded through the perforations of the respective series of blocks and having it; ends threaded through the hi1 blocks of one series to provide ternrii 3, and cat hes on the offset parts at the upper .h plates engageable with the large he top of the frame to support latter in position. and against downward in an ele :trical heati device, a housa the frame to move past same whereby to enable the catches to support the frame against downward movement upon return movement of the catches to normal position.

3. A device of the character described, comprising a pipe, a pair of heat radiating plates inside said pipe, means for supporting said plates away from the wall of said pipe and in spaced parallel relation to each other, an electrical heating unit consisting oi a frame having wires strung back and forth thereon, and means for detachably supporting said heating unit between said plates.

4. In an electric heating device, a housing, a frame in the housin electric heat radiating means carried by the frame, and catches in the housing, the catches being movable to permit an end of the frame to move past same whereby to enable the catches to support the frame against downward movement upon return movement of the catches to normal position.

5. In an electric heating device, a housing, a frame in the housing, electric heat radiating means carried by the frame, and means in the housing movable to permit an end of the frame to move therepast and to then move into engagement with the frame whereby to efl'ect suspension of the frame.

6. A device of the character described comprising a conduit, a pair oi heat elements having radiating, surfaces, means for attaching said elements to the conduit in spaced substantially parallel relation, and a removable heating unit inserted between said elements.

In testimony whereof I have hereunto signed my name to this specification.

ROY M. MOFFITT. 

